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Information for Assembling, Operating
and Servicing Herberholz Shutting Valves
1 . INFORMATION
These operating instructions have the purpose of helping the customer properly assemble and
service shutting valves to allow disturbance-free operation. Herberholz shutting valves should
remain in the factory packaging until they are used (i.e., assembled) and they should be stored
dust-free and protected against light. They do not have to be preserved if they are properly stored.
Only trained personnel may assemble, disassemble and repair them. However, before
commencing disassembly work, the responsible department should clear the corresponding
pipeline conduit and ensure that there is no pressure. The responsible personnel are in charge of
shutting down the actuators for the Herberholz shutting valves (clearing, disassembling and
securing actuator connections). Herberholz shutting valves are designed for special customer
functions and the fittings should only be used as intended.
2. DESCRIPTION
Herberholz shutting valves have important shutting and regulating functions in pipelines such as
reliably shutting off liquid and gaseous substances and bulk materials. The AK/DVGW shutting
valve is only licensed for gases as per DVGW's G260 work sheet.
3. ASSEMBLY
Herberholz shutting valves are engineered for installation between flanges in conformity with form
A, form B or form E of DIN EN 1092-1. The manufacturer should be notified of other flanges being
used. The medium may flow through in either direction and the shutting valve may be installed in
any position. The sleeve of Herberholz shutting valves acts as a flange seal. Please do not use
any additional flange seals. Furthermore, flanges may not be welded to the pipeline when the
shutting valve is mounted because it burns the sleeve and destroys it. Insert the shutting valve
between the flanges with a slightly opened valve disc, tighten slightly and align the shutting valve
with 4 flange bolts. If the flanges are too close to one another in a finished pipeline, they have to
be pressed apart with an expansion tool until the valve can be inserted with a slight amount of play
(refer to Figure 1). Attach the pipeline flange to the pipeline with electrical spot welding (refer to
Figure 2), remove the flange screws again and remove the shutting valve. Then weld the flanges
Herberholz GmbH
Pregelstraße 6
D – 58256 Ennepetal
e-Mail: info@herberholz.com
Internet: http://www.herberholz.com
Telefon 02333 / 9898-0
Telefax 02333 / 9898-48
AK+AK/DVGW
Type:
Situation as per: 10/02
Seite 1 von 9
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Table of Contents
Summary of Contents for Herberholz AK/DVGW
- Page 1 The medium may flow through in either direction and the shutting valve may be installed in any position. The sleeve of Herberholz shutting valves acts as a flange seal. Please do not use any additional flange seals. Furthermore, flanges may not be welded to the pipeline when the shutting valve is mounted because it burns the sleeve and destroys it.
- Page 2 Information for Assembling, Operating AK+AK/DVGW Type: and Servicing Herberholz Shutting Valves Situation as per: 10/02 onto the pipeline (refer to Figure 3). After the flanges have cooled off, install the shutting valve again. It must be possible to easily insert the fittings between the flanges to ensure that the sleeve is not damaged.
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Page 3: Operation
The sleeve and valve disc have to be resistant to the flowthrough medium. Herberholz shutting valves are dimensioned to ensure that they can be used for throttling function in the adjusting angle range of 15 to 70 degrees. Please also ensure that fittings are not exposed to cavitation. -
Page 4: Maintenance
Information for Assembling, Operating AK+AK/DVGW Type: and Servicing Herberholz Shutting Valves Situation as per: 10/02 7. MAINTENANCE The shutting valve have to be properly disassembled before commencing maintenance work (refer to 5. Disassembly). Clamp the shutting valve to ensure that the sleeve is not damaged. Then... - Page 5 Information for Assembling, Operating AK+AK/DVGW Type: and Servicing Herberholz Shutting Valves Situation as per: 10/02 pull the upper shaft from the housing (using a screwed-in threaded rod if necessary). unscrew the thread plugs. remove the seal ring from the thread plugs, check and replace if necessary.
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Page 6: Troubleshooting Table
Information for Assembling, Operating AK+AK/DVGW Type: and Servicing Herberholz Shutting Valves Situation as per: 10/02 B) shutting valves with divided shaft apply suitable grease to upper and lower shaft (such as Bernlub Hydrohaf 2). position the valve disc in the sleeve to ensure that the shaft receptacles for the valve disc (dihedral on the top) are flush with the upper and lower drill hole opposite it on the sleeve and housing. - Page 7 Information for Assembling, Operating AK+AK/DVGW Type: and Servicing Herberholz Shutting Valves Situation as per: 10/02 the defect the cause of the defect how to correct the defect pipe flange leaky shutting valve clear the pipeline conduit centred disassemble the shutting valve check the sleeve for damage mount the shutting valve (refer to the „Assembly...
- Page 8 Information for Assembling, Operating AK+AK/DVGW Type: and Servicing Herberholz Shutting Valves Situation as per: 10/02 the defect the cause of the defect how to correct the defect the sleeve is porous check the operating temperature and determine if it satisfies specifications clear the pipeline conduit;...
- Page 9 Information for Assembling, Operating AK+AK/DVGW Type: and Servicing Herberholz Shutting Valves Situation as per: 10/02 the defect the cause of the defect how to correct the defect the position of the valve check the actual position of the valve disc...
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